chroot_version_hooks.d: clean out old hard-host-depends

Now that our builders aren't pulling in hard-host-depends to build
binpkgs, people with older chroots are hitting an unresolvable block.
We don't need this package anymore so just unmerge it.

BUG=chromium:329920
TEST=`./run_chroot_version_hooks` removed hard-host-depends package & from world set

Change-Id: I6657e5d10dca33a7447addf95b37b8c130f90091
Reviewed-on: https://chromium-review.googlesource.com/194568
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/chroot_version_hooks.d/89_migrate_to_target-sdk b/chroot_version_hooks.d/89_migrate_to_target-sdk
new file mode 100644
index 0000000..52e599c
--- /dev/null
+++ b/chroot_version_hooks.d/89_migrate_to_target-sdk
@@ -0,0 +1,10 @@
+# Copyright 2014 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Some people have hard-host-depends listed in their @world set which causes
+# binpkg-only upgrades to fail: we aren't building this package anymore as
+# we've converted everyone to virtual/target-sdk.  So clean it out.
+
+sudo sed -i -e '/^chromeos-base\/hard-host-depends/d' /var/lib/portage/world
+sudo qmerge -yU chromeos-base/hard-host-depends